Seegs Posted March 21, 2002 Share Posted March 21, 2002 Hi Myles, I posted this question over at HC and noticed things, unfortunatly started to heat up again...so I'll repost it here. I've just noticed with my new GT 5881 NOS's, after about ten hours of use, they are starting to have a blue glow to them. I've noticed some crossover distortion, lack of punch compared to when they were first installed. I've set the bias at 42-43.5 mv's. What does the blue glow indicate as there was only a very faint reddish glow when the tubes were new? Seegs Link to comment Share on other sites More sharing options...
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